First investigations of the biology of <em>Ascochyta sojina</em> Bedlan

Authors

  • Marielies Mayr Universität für Bodenkultur, Department für Nutzpflanzenwissenschaften, Wien, Österreich
  • Astrid Plenk Österreichische Agentur für Gesundheit und Ernährungssicherheit GmbH, Institut für Nachhaltige Pflanzenproduktion, Wien, Österreich
  • Gerhard Bedlan Österreichische Agentur für Gesundheit und Ernährungssicherheit GmbH, Institut für Nachhaltige Pflanzenproduktion, Wien, Österreich

DOI:

https://doi.org/10.5073/JfK.2017.08.04

Keywords:

Soybean, Ascochyta sojina, seed transmission, infection pathway, resilience of varieties

Abstract

It has been proven for the first time that Ascochyta sojina can be transmitted by seed and penetrates the leaves through the stomata. The optimum growth temperature of the fungus is 25°C. A. sojina does not grow at temperatures over 30°C and below 5°C, however it remains viable.

In this study 85 soybean varieties were tested for their susceptibility towards A. sojina. An adjusted evaluation scheme was created to determine the infection rate and the resilience towards A. sojina. Most of the soybean varieties showed a resilience of 60%. There was no vertical resistance since the first leaves were more susceptible than the resilient seed leaves. A. sojina is the second most common phytopathogenic fungus on soybean in the investigated cultivated areas in Austria.

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Published

2017-08-01

Issue

Vol. 69 No. 8 (2017)

Section

Short Communication

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